A psychological approach to abnormal behaviorLeonard P. Ullmann, Leonard P. Ullman, Leonard Krasner · First published 1969Open the Tome
Case studies in Behavior modificationLeonard P. Ullmann & Leonard Krasner · First published 1965Open the Tome
Research in behavior modificationLeonard Krasner, Leonard P. Ullmann · First published 1965Open the Tome
Research in behavior modificationAlbert Bandura, Leonard Krasner, Leonard P. Ullmann · First published 1965Open the Tome
